Check the listing for details. *** World Archery Cap *** UV3 Scope Centering Ring Ultraview UV3 Circle Housing. Condition: New without tags. Listed at 20.00 USD. *** Ultraview UV3 scope is NOT included. Only shown as reference to show example *** *** If you needed the larger XL scope size, please look at my other listing for it. *** This will replace your stock light cartridge housing. If you wanted a centering ring with the use of the light cartridge please see my other listing ....... OVERVIEW ....... It fits all smaller sized UV3 scopes. This is my version of the world archery cap that allows a full circle to be viewed. It makes alignment and centering your sight picture more consistent. In certain situations you are not allowed to use a light when shooting certain events. Or if your light cartridge is broken and didn't want to replace it. This basically slides in and attaches with the standard 2 set screws. Standard option is a black housing with your choice of either colored ring. If you want a different color for the housing other than black then please contact me prior to buying.